arch/arm/mach-uniphier/clk/clk-ld4.c

   1 /*
   2  * Copyright (C) 2011-2015 Panasonic Corporation
   3  * Copyright (C) 2015-2016 Socionext Inc.
   4  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <linux/io.h>
  10
  11 #include "../init.h"
  12 #include "../sc-regs.h"
  13
  14 void uniphier_ld4_clk_init(void)
  15 {
  16         u32 tmp;
  17
  18         /* deassert reset */
  19         tmp = readl(SC_RSTCTRL);
  20 #ifdef CONFIG_UNIPHIER_ETH
  21         tmp |= SC_RSTCTRL_NRST_ETHER;
  22 #endif
  23 #ifdef CONFIG_NAND_DENALI
  24         tmp |= SC_RSTCTRL_NRST_NAND;
  25 #endif
  26         writel(tmp, SC_RSTCTRL);
  27         readl(SC_RSTCTRL); /* dummy read */
  28
  29         /* provide clocks */
  30         tmp = readl(SC_CLKCTRL);
  31 #ifdef CONFIG_UNIPHIER_ETH
  32         tmp |= SC_CLKCTRL_CEN_ETHER;
  33 #endif
  34 #ifdef CONFIG_USB_EHCI_HCD
  35         tmp |= SC_CLKCTRL_CEN_MIO | SC_CLKCTRL_CEN_STDMAC;
  36 #endif
  37 #ifdef CONFIG_NAND_DENALI
  38         tmp |= SC_CLKCTRL_CEN_NAND;
  39 #endif
  40         writel(tmp, SC_CLKCTRL);
  41         readl(SC_CLKCTRL); /* dummy read */
  42 }